ABB RELION 670 Series Technical Manual page 1013

1MRK 502 066-UUS B
Equal Band
IEC15000261 V1 EN-US
Figure 528: Operation principle of REALCOMP
15.17.7 Technical data
REALCOMP function can compare the values from milli value level to giga value level and the
maximum expectable accuracy level from the function is 10 µ.
Table 718: REALCOMP Technical data
Operate value,
EqualBandHigh
and EqualBandLow
Reset value,
EqualBandHigh
Reset value,
EqualBandLow
Table 719: Number of REALCOMP instances
Function
REALCOMP
Technical manual
INEQUAL Reset / INHIGH Set INEQUAL Set / INHIGH Reset
EqualBandHigh
REF or SetValue
EqualBandLow
INEQUAL Reset / INLOW Set
When EnaAbs is set as absolute comparison and SetValue is set less than 0.2% of
the set unit then INLOW output will never pickups. During the above mentioned
condition, due to marginal value for avoiding oscillations of function outputs, the
INLOW output will never set.
Function
3 ms
4
Internal
Hysteresis for
equal band
INEQUAL Set / INLOW Reset
IEC15000261-1-en.vsdx
Accuracy
±0.5% of set value
> 0.1% of set RefPrefix
< 0.1% of set RefPrefix
Quantity with cycle time
8 ms
4
Section 15
Logic
GUID-62792FCB-B436-4034-9A08-C9FF918FF547 v1
GUID-3FDD7677-1D86-42AD-A545-B66081C49B47 v1
100 ms
4
1007